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AR-15/M16 Buffer Tube 2 Position Mil-Spec Retro
Features period-correct anodized grey finish Diameter fits mil-spec buttstocks Made from 6061-T6 aluminum
The Brownells 2-Position Mil-Spec AR-15 Buffer Tube is the perfect addition for retro AR models such as XM177E1, XM177, Model 619/620, XM177E2, GAU-5A, Model 639, GAU-5A/A, and Model 653/654.
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$25.99
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A comprehensive overview of every major component in an AR-15 build—including what's inside bolt carrier groups and parts kits—organized by assembly for new builders.
12 min read
Guide
A neutral overview of AR-15 buffer systems, covering carbine vs. rifle receiver extensions, buffer weights, springs, and how these parts affect cycling and recoil.
5 min read